A new multi-spectral system developed at the National Gallery is presented. The system is capable of measuring the spectral reflectance per pixel of a painting. These spectra are found to be almost as accurate as those recorded with a spectrophotometer; there is no need for any spectral
reconstruction apart from a simple cubic spline interpolation between measured points. The procedure for recording spectra is described and the accuracy of the system is quantified. An example is presented of the use of the system to scan a painting of
Haida Liang, David Saunders, John Cupitt, Mohamed Benchouika, "A New Multi-spectral Imaging System for Examining Paintings" in Proc. IS&T CGIV 2004 Second European Conf. on Colour in Graphics, Imaging, and Vision, 2004, pp 229 - 234, https://doi.org/10.2352/CGIV.2004.2.1.art00047